Hi! Glad to hear you are inviting all your friends to Punt! With regards to tipping between friends, you can simply withdraw to their deposit address!

Usually, there are no restrictions on tipped balance. But there will be rollover requirement on the fund if we make a withdrawal to our friends deposit address. Even the system may suspect the user as an abuser with multiple accounts. So, it can't be considered as a tip by any means. Punt.com Dev team should work to implement the internal tipping system instead of giving such imperfect suggestion.
Tipping feature is like a must feature for a site with chat room. Aside it can be used to spread some gifts to other users in chat, it can be also used for those who are willing to give an offer for anyone who register using a referral link. Lets say I'm having a great number of followers in social media and I invite my followers to register in punt by offering a lottery or a direct bonus for those who want to register and play in punt using my referral link. It is not only useful for players but will be also useful for punt to get more players.
Man, I never saw the tipping feature from that angle! It's like a hidden ace up the sleeve for influencers to rack up more followers and spread the punt gospel! Picture this: offering your peeps a shot at the jackpot just by signing up and hitting the play button with your referral link. It's like a double dose of victory for all parties! This doesn't just reel in more players for Punt, but it also blsters influencers' reach and follower count. Talk about a brilliant brainchild that's got everyone's back!